The glare's not lost on John, but he's not going to even try and deal with that now. "Tell Nathan that the house is standing you a drink, Ms. Helfer."
It's not subtle, but it will get her out of the way. And he'll have someone check the cards, in case there's any kind of truth. Any kind of sharping needs stopped. Like, now.
Rob reaches the spifflicated hothead, and drops a heavy hand on his shoulder, and John's well aware that back-up's close at hand. "No harm," John agrees pleasantly. "So you're not gonna mind taking a powder, right? Rob, he's all yours. Scram."